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The Aviation PointTechnical data sheet · theaviationpoint.com/parts/screws/an505/

AN505 screw — flat, 82 degree

Screw, Machine, Flat Head, 82 Degree, Coarse Thread, from AN505 Rev. 7. Every row below is transcribed from the standard and has its own link.

AN505 at a glance

AN505, screw, machine, flat head, 82 degree, coarse thread
AN505
AN505 engineering drawing with dimensions
Engineering drawing · dimensions in inches

Specification

ItemValue
Headflat, 82 degree
Drivecross-recess (design 1) or slotted
Thread seriescoarse (UNC-2A)
MaterialCarbon steel grade 1010 (UNS G10100), ASTM A108, 55,000 psi min UTS; corrosion resistant steel QQ-S-763 class 430 or XM-7, ASTM A582 type 303 / 303Se, or MIL-S-7720 composition 302; brass ASTM B16, B36, B121, B134, B159 or B206, 55,000 psi min; aluminum alloy 2024, QQ-A-225/3 or QQ-A-225/6.
ItemValue
Heat treatmentAluminum alloy: 62,000 psi minimum ultimate tensile strength, MIL-H-6088.
FinishCarbon steel: cadmium plate QQ-P-416 Type II Class 3. Brass: black chemical finish MIL-F-495 or cadmium plate QQ-P-416 Type II Class 3 (per part number code). CRES: passivate QQ-P-35. Aluminum: anodize MIL-A-8625 Type I or II Class 1.
ProcurementFF-S-92
StatusRev. 7 (11 Sep 1997), Notice 1 (18 Nov 1999): inactive for new design, no longer used except for replacement. Cross-recessed and slotted head screws are canceled (note 7); superseded by MS35190, MS35198, MS35202 and MS51959. Not for airframe construction (note 6). Sizes No. 3-48 and No. 5-40 inactive for new design (note 8).

Dimensions by size

Dimension, in2-56 UNC-2A3-48 UNC-2A4-40 UNC-2A5-40 UNC-2A6-32 UNC-2A8-32 UNC-2A10-24 UNC-2A1/4-20 UNC-2A5/16-18 UNC-2A3/8-16 UNC-2A
A — major diameter, max.086.099.112.125.138.164.190.250.313.375
J — slot width.031 – .023.035 – .027.039 – .031.043 – .035.048 – .039.054 – .045.060 – .050.075 – .064.084 – .072.094 – .081
D diamax sharp .172, min sharp .156, abs min with max F .150max sharp .199, min sharp .181, abs min with max F .175max sharp .225, min sharp .207, abs min with max F .200max sharp .252, min sharp .232, abs min with max F .225max sharp .279, min sharp .257, abs min with max F .249max sharp .332, min sharp .308, abs min with max F .300max sharp .385, min sharp .359, abs min with max F .348max sharp .507, min sharp .477, abs min with max F .462max sharp .635, min sharp .600, abs min with max F .581max sharp .762, min sharp .722, abs min with max F .700
F max.014.015.016.018.019.022.025.031.037.043
H ref.051 – .040.059 – .048.067 – .055.075 – .062.083 – .069.100 – .084.116 – .098.153 – .131.191 – .165.230 – .200
H1.036 – .028.041 – .034.047 – .039.053 – .043.058 – .048.070 – .059.081 – .069.107 – .092.134 – .116.161 – .140
K.023 – .015.027 – .017.030 – .020.034 – .022.038 – .024.045 – .029.053 – .034.070 – .046.088 – .058.106 – .070
R max.035.040.050.050.060.060.085.100.110.125
undercut slottedH ['.036', '.028'], K ['.022', '.015']H ['.041', '.034'], K ['.025', '.017']H ['.047', '.039'], K ['.028', '.020']H ['.053', '.043'], K ['.031', '.022']H ['.058', '.048'], K ['.035', '.024']H ['.070', '.059'], K ['.040', '.029']H ['.081', '.069'], K ['.047', '.034']H ['.107', '.092'], K ['.061', '.046']H ['.134', '.116'], K ['.076', '.058']H ['.161', '.140'], K ['.091', '.070']

Minimum – maximum as tabulated in AN505 Rev. 7; letters as on the standard's drawing.

Part numbers and lengths

Every part number of AN505 Rev. 7, by thread size, each with its own link.

2-56 UNC-2A10 part numbers · tolerance +0/-1/32

Part no.Length, in
AN505-2-33/16
AN505-2-41/4
AN505-2-55/16
AN505-2-63/8
AN505-2-77/16
AN505-2-81/2
AN505-2-99/16
AN505-2-105/8
AN505-2-1111/16
AN505-2-123/4

3-48 UNC-2A14 part numbers · tolerance +0/-1/32

Part no.Length, in
AN505-3-33/16
AN505-3-41/4
AN505-3-55/16
AN505-3-63/8
AN505-3-77/16
AN505-3-81/2
AN505-3-99/16
AN505-3-105/8
AN505-3-1111/16
AN505-3-123/4
AN505-3-1313/16
AN505-3-147/8
AN505-3-1515/16
AN505-3-161

4-40 UNC-2A18 part numbers

Part no.Length, inTol.
AN505-4-33/16+0/-1/32
AN505-4-41/4+0/-1/32
AN505-4-55/16+0/-1/32
AN505-4-63/8+0/-1/32
AN505-4-77/16+0/-1/32
AN505-4-81/2+0/-1/32
AN505-4-99/16+0/-1/32
AN505-4-105/8+0/-1/32
AN505-4-1111/16+0/-1/32
AN505-4-123/4+0/-1/32
AN505-4-1313/16+0/-1/32
AN505-4-147/8+0/-1/32
AN505-4-1515/16+0/-1/32
AN505-4-161+0/-1/32
AN505-4-181-1/8+0/-1/16
AN505-4-201-1/4+0/-1/16
AN505-4-221-3/8+0/-1/16
AN505-4-241-1/2+0/-1/16

5-40 UNC-2A18 part numbers

Part no.Length, inTol.
AN505-5-33/16+0/-1/32
AN505-5-41/4+0/-1/32
AN505-5-55/16+0/-1/32
AN505-5-63/8+0/-1/32
AN505-5-77/16+0/-1/32
AN505-5-81/2+0/-1/32
AN505-5-99/16+0/-1/32
AN505-5-105/8+0/-1/32
AN505-5-1111/16+0/-1/32
AN505-5-123/4+0/-1/32
AN505-5-1313/16+0/-1/32
AN505-5-147/8+0/-1/32
AN505-5-1515/16+0/-1/32
AN505-5-161+0/-1/32
AN505-5-181-1/8+0/-1/16
AN505-5-201-1/4+0/-1/16
AN505-5-221-3/8+0/-1/16
AN505-5-241-1/2+0/-1/16

6-32 UNC-2A30 part numbers

Part no.Length, inTol.
AN505-6-33/16+0/-1/32
AN505-6-41/4+0/-1/32
AN505-6-55/16+0/-1/32
AN505-6-63/8+0/-1/32
AN505-6-77/16+0/-1/32
AN505-6-81/2+0/-1/32
AN505-6-99/16+0/-1/32
AN505-6-105/8+0/-1/32
AN505-6-1111/16+0/-1/32
AN505-6-123/4+0/-1/32
AN505-6-1313/16+0/-1/32
AN505-6-147/8+0/-1/32
AN505-6-1515/16+0/-1/32
AN505-6-161+0/-1/32
AN505-6-181-1/8+0/-1/16
AN505-6-201-1/4+0/-1/16
AN505-6-221-3/8+0/-1/16
AN505-6-241-1/2+0/-1/16
AN505-6-261-5/8+0/-1/16
AN505-6-281-3/4+0/-1/16
AN505-6-301-7/8+0/-1/16
AN505-6-322+0/-1/16
AN505-6-342-1/8+0/-3/32
AN505-6-362-1/4+0/-3/32
AN505-6-382-3/8+0/-3/32
AN505-6-402-1/2+0/-3/32
AN505-6-422-5/8+0/-3/32
AN505-6-442-3/4+0/-3/32
AN505-6-462-7/8+0/-3/32
AN505-6-483+0/-3/32

8-32 UNC-2A29 part numbers

Part no.Length, inTol.
AN505-8-41/4+0/-1/32
AN505-8-55/16+0/-1/32
AN505-8-63/8+0/-1/32
AN505-8-77/16+0/-1/32
AN505-8-81/2+0/-1/32
AN505-8-99/16+0/-1/32
AN505-8-105/8+0/-1/32
AN505-8-1111/16+0/-1/32
AN505-8-123/4+0/-1/32
AN505-8-1313/16+0/-1/32
AN505-8-147/8+0/-1/32
AN505-8-1515/16+0/-1/32
AN505-8-161+0/-1/32
AN505-8-181-1/8+0/-1/16
AN505-8-201-1/4+0/-1/16
AN505-8-221-3/8+0/-1/16
AN505-8-241-1/2+0/-1/16
AN505-8-261-5/8+0/-1/16
AN505-8-281-3/4+0/-1/16
AN505-8-301-7/8+0/-1/16
AN505-8-322+0/-1/16
AN505-8-342-1/8+0/-3/32
AN505-8-362-1/4+0/-3/32
AN505-8-382-3/8+0/-3/32
AN505-8-402-1/2+0/-3/32
AN505-8-422-5/8+0/-3/32
AN505-8-442-3/4+0/-3/32
AN505-8-462-7/8+0/-3/32
AN505-8-483+0/-3/32

10-24 UNC-2A28 part numbers

Part no.Length, inTol.
AN505-10-55/16+0/-1/32
AN505-10-63/8+0/-1/32
AN505-10-77/16+0/-1/32
AN505-10-81/2+0/-1/32
AN505-10-99/16+0/-1/32
AN505-10-105/8+0/-1/32
AN505-10-1111/16+0/-1/32
AN505-10-123/4+0/-1/32
AN505-10-1313/16+0/-1/32
AN505-10-147/8+0/-1/32
AN505-10-1515/16+0/-1/32
AN505-10-161+0/-1/32
AN505-10-181-1/8+0/-1/16
AN505-10-201-1/4+0/-1/16
AN505-10-221-3/8+0/-1/16
AN505-10-241-1/2+0/-1/16
AN505-10-261-5/8+0/-1/16
AN505-10-281-3/4+0/-1/16
AN505-10-301-7/8+0/-1/16
AN505-10-322+0/-1/16
AN505-10-342-1/8+0/-3/32
AN505-10-362-1/4+0/-3/32
AN505-10-382-3/8+0/-3/32
AN505-10-402-1/2+0/-3/32
AN505-10-422-5/8+0/-3/32
AN505-10-442-3/4+0/-3/32
AN505-10-462-7/8+0/-3/32
AN505-10-483+0/-3/32

1/4-20 UNC-2A28 part numbers

Part no.Length, inTol.
AN505-416-55/16+0/-1/32
AN505-416-63/8+0/-1/32
AN505-416-77/16+0/-1/32
AN505-416-81/2+0/-1/32
AN505-416-99/16+0/-1/32
AN505-416-105/8+0/-1/32
AN505-416-1111/16+0/-1/32
AN505-416-123/4+0/-1/32
AN505-416-1313/16+0/-1/32
AN505-416-147/8+0/-1/32
AN505-416-1515/16+0/-1/32
AN505-416-161+0/-1/32
AN505-416-181-1/8+0/-1/16
AN505-416-201-1/4+0/-1/16
AN505-416-221-3/8+0/-1/16
AN505-416-241-1/2+0/-1/16
AN505-416-261-5/8+0/-1/16
AN505-416-281-3/4+0/-1/16
AN505-416-301-7/8+0/-1/16
AN505-416-322+0/-1/16
AN505-416-342-1/8+0/-3/32
AN505-416-362-1/4+0/-3/32
AN505-416-382-3/8+0/-3/32
AN505-416-402-1/2+0/-3/32
AN505-416-422-5/8+0/-3/32
AN505-416-442-3/4+0/-3/32
AN505-416-462-7/8+0/-3/32
AN505-416-483+0/-3/32

5/16-18 UNC-2A25 part numbers

Part no.Length, inTol.
AN505-516-81/2+0/-1/32
AN505-516-99/16+0/-1/32
AN505-516-105/8+0/-1/32
AN505-516-1111/16+0/-1/32
AN505-516-123/4+0/-1/32
AN505-516-1313/16+0/-1/32
AN505-516-147/8+0/-1/32
AN505-516-1515/16+0/-1/32
AN505-516-161+0/-1/32
AN505-516-181-1/8+0/-1/16
AN505-516-201-1/4+0/-1/16
AN505-516-221-3/8+0/-1/16
AN505-516-241-1/2+0/-1/16
AN505-516-261-5/8+0/-1/16
AN505-516-281-3/4+0/-1/16
AN505-516-301-7/8+0/-1/16
AN505-516-322+0/-1/16
AN505-516-342-1/8+0/-3/32
AN505-516-362-1/4+0/-3/32
AN505-516-382-3/8+0/-3/32
AN505-516-402-1/2+0/-3/32
AN505-516-422-5/8+0/-3/32
AN505-516-442-3/4+0/-3/32
AN505-516-462-7/8+0/-3/32
AN505-516-483+0/-3/32

3/8-16 UNC-2A25 part numbers

Part no.Length, inTol.
AN505-616-81/2+0/-1/32
AN505-616-99/16+0/-1/32
AN505-616-105/8+0/-1/32
AN505-616-1111/16+0/-1/32
AN505-616-123/4+0/-1/32
AN505-616-1313/16+0/-1/32
AN505-616-147/8+0/-1/32
AN505-616-1515/16+0/-1/32
AN505-616-161+0/-1/32
AN505-616-181-1/8+0/-1/16
AN505-616-201-1/4+0/-1/16
AN505-616-221-3/8+0/-1/16
AN505-616-241-1/2+0/-1/16
AN505-616-261-5/8+0/-1/16
AN505-616-281-3/4+0/-1/16
AN505-616-301-7/8+0/-1/16
AN505-616-322+0/-1/16
AN505-616-342-1/8+0/-3/32
AN505-616-362-1/4+0/-3/32
AN505-616-382-3/8+0/-3/32
AN505-616-402-1/2+0/-3/32
AN505-616-422-5/8+0/-3/32
AN505-616-442-3/4+0/-3/32
AN505-616-462-7/8+0/-3/32
AN505-616-483+0/-3/32

Part number

How a AN505 part number is built, segment by segment

What each code means

PartMeaning
FormatAN505[material]<size>[R or -]<length>
-2Size No. 2-56
-3Size No. 3-48
-4Size No. 4-40
-5Size No. 5-40
-6Size No. 6-32
-8Size No. 8-32
-10Size No. 10-24
-416Size 1/4-20
-516Size 5/16-18
-616Size 3/8-16
LengthLength in sixteenths of an inch (-8 = 8/16 = 1/2 in)
ExampleAN505-4-8 = slotted, carbon steel, cadmium plated, 4-40 UNC-2A, 1/2 inch long; AN505C4R8 = cross-recessed, CRES, passivated, 4-40, 1/2 inch long
Length tolerance, up to 1 in+0/-1/32
Length tolerance, 1-1/8 to 2 in+0/-1/16
Length tolerance, 2-1/8 to 3 in+0/-3/32
(none)Material: carbon steel, cadmium plated
BMaterial: brass, black chemical finish
PBMaterial: brass, cadmium plated
UBMaterial: brass, no plating or finish
CMaterial: corrosion resistant steel, passivated
DDMaterial: aluminum alloy, anodized
-Drive: slotted head (no code between first and second dash number)
RDrive: cross-recessed head
UndercutDash numbers marked (d) have undercut heads.

Notes from the standard

  • Thread: class 2A, FED-STD-H28/2. Complete threads extend to within 2 threads of the head bearing surface for screws up to and including 2 in; longer screws have a minimum complete thread of 1-3/4 in.
  • Unthreaded portion diameter not less than the minimum pitch diameter nor more than the maximum major diameter of the thread.
  • Sizes No. 10 and larger carry a manufacturer symbol on the top of the head, indented. CRES sizes No. 5 and larger carry one dash, indented.
  • Cross-recess in accordance with MS9006. Slotted head: dimensions per the table.
  • The thread-size heading of the dash number table prints 5/16-16; the dimension table prints 5/16-18 UNC-2A (5/16-18 used here).

Related

CalculatorPart number cross-referenceType any AN505 number and land on its row.GuideScrewsThe family side by side.Data sheetAN503Screw, Machine, Drilled Fillister Head, Coarse ThreadData sheetAN510Screw, Machine, Flat Head, 82 Degree, Fine Thread

Sources

Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.
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